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FIZIKA A7 (1998) 4, 165-176
 
A RESONANCE TREATMENT AND ITS APPLICATION TO ELECTRON TRANSFER
REACTIONS IN A PHOTOSYNTHETIC REACTION CENTRE
TIBERIUS CHECHEa, LUCIAN GEORGESCUa, EMIL
BARNAa and ION DINAb
aUniversity of Bucharest, Faculty of Physics, Department
of Polymer Physics,
P.O.Box 11-Magurele R-76900, Bucharest, Romania
E-mail: chec@brid.fizica.unibuc.ro, Tel.:
40-1-3309873, Fax: 40-1-4208625
bSfântul Ioan-Hospital, os. Vitan-Bârzeti 13, Bucharest
Romania
Received 20 May 1998; revised manuscript received 12 December 1998
Accepted 11 January 1999
A detailed theoretical description of the "resonance treatment" based on
Bloch equations is presented for a dissipative two-state system, in the limit of weak
coupling between a microscopic subsystem and its environment, using the framework of the
"spin-boson" model. For an Ohmic spectral density function, the dynamics of the
transition probability for an overdamped regime is applied in the case of the primary
electron transfer reaction in a bacterial photosynthetic reaction center.
PACS numbers: 31.70.Hq 82.20.Rp
UDC 539.196
Keywords: dissipative two-state system, microscopic subsystem and its environment, weak
coupling, ``spin-boson" model, overdamped regime, primary electron transfer reaction,
bacterial photosynthetic reaction
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